ZIP Code 48817 — Corunna, MI
48817 is a standard (street delivery) ZIP code serving Corunna, Michigan, in Shiawassee County. To mail something here you only need these five digits — but the four-digit extension narrows delivery to a single point, and it is what USPS bulk postage discounts are priced on.
ZIP code 48817 at a glance
| ZIP code | 48817 |
|---|---|
| Primary city | Corunna |
| State | Michigan (MI) |
| County | Shiawassee FIPS 26155 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Detroit |
| Population | 5,416 |
| Coordinates | 43.017950, -84.037720 |
How ZIP+4 works in 48817
The four digits after the hyphen encode a delivery segment inside 48817. In practice one segment usually means:
- One side of one block — odd numbers on a street between two cross streets
- A single large building, or one floor of it
- A group of PO boxes, sometimes a single box
- A single business that receives enough mail to warrant its own code
That is why 48817 has no single ZIP+4: two neighbors across the street from each other usually have different ones. Enter a street address above and we will return the exact nine-digit code along with the standardized USPS address format.
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 48817.
| ZIP | City | Distance |
|---|---|---|
| 48449 | Lennon, MI | 4.9 mi |
| 48476 | Vernon, MI | 5.5 mi |
| 48867 | Owosso, MI | 7.6 mi |
| 48429 | Durand, MI | 7.8 mi |
| 48460 | New Lothrop, MI | 8 mi |
| 48433 | Flushing, MI | 9.5 mi |
| 48414 | Bancroft, MI | 10.9 mi |
| 48473 | Swartz Creek, MI | 11.9 mi |
| 48841 | Henderson, MI | 12.1 mi |
| 48532 | Flint, MI | 12.3 mi |
| 48616 | Chesaning, MI | 12.7 mi |
| 48436 | Gaines, MI | 13 mi |
Questions about 48817
What is the ZIP+4 code for 48817?
48817 is the five-digit ZIP code. The ZIP+4 adds four more digits that identify a specific delivery point — usually one side of a city block, a single building, or a group of PO boxes. Because those four digits change from address to address within 48817, you need to look up a specific street address to get them.
What city is 48817?
48817 is assigned to Corunna, Michigan, in Shiawassee County.
Do I need to use the ZIP+4?
It is optional for ordinary mail, but it speeds up sorting and it is required for most USPS bulk-mail postage discounts. Many address-verification and e-commerce systems also use ZIP+4 to confirm a delivery point exists.
Need thousands of these?
Upload a CSV and get ZIP+4, county, carrier route, and delivery-point data appended to every row — or call the API directly.